Base64 Encoder/Decoder
Online Base64 encoder and decoder, supports Unicode and UTF-8
About Base64 Encoder/Decoder
Base64 encoding is widely used for transmitting binary data in text-based protocols. Common use cases include embedding images in HTML/CSS (Data URI), passing binary data in JSON, email attachments (MIME), and JWT token encoding. This tool supports bidirectional conversion between text and Base64, with full Unicode support including Chinese characters. All operations happen locally in your browser.